2009-06-24 Tracking News

Contents on 24 June '09

IAU Minor Planet Center
- NEOCP Activity -- four listings: 1 new, 3 updated
- New MPECs -- four MPECs
Observers -- seventeen observing facilities
Impact Risk Monitoring -- three objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Earth's Busy Neighborhood Traffic Report
Ephemerides for risk-rated and nearby objects
Old & new CRT Archive
Old News Archive & Small Objects Archive

The latest A/CC news is available via framed access, RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.

Navigation tips: Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days through a calendar interface. And use the all-up news archive to access news from any time since A/CC began in early 2002. To keep track of what's new each day, watch the Chronology section.

NEOCP Activity on 24 June '09

The MPC's NEO Confirmation Page has 4 listings: 1 new, 3 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and three updated listings. All of these were "one nighters." So far The Tracking News has counted a total of eight listings on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs on 24 June '09

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been four MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-M31 time-stamped "06:06 UT" - Daily Orbit Update - see below
MPEC 2009-M32 time-stamped "15:28 UT" - 2009 ML1 - see below
MPEC 2009-M33 time-stamped "19:10 UT" - 2009 MM1 - see below
MPEC 2009-M34 time-stamped "21:07 UT" - 2005 UN524 = 2003 YW292

MPEC 2009-M34 - "21:07 UT" - 2005 UN524 = 2003 YW292

K05Uq4N 2005 UN524 from Mauna Kea (2004 Nov. 9.37-43p3 at g=22.7-8 & 2004 Nov. 10.29p1 at g=22.8)

MPEC 2009-M33 - "19:10 UT" - 2009 MM1

K09M01M 2009 MM1 was discovered at 1438 UT on 23 June by the Siding Spring Survey (SSS), which observed it at June 23.61-67p6, 23.72p2, and 24.61-62p2.

MPEC 2009-M32 - "15:28 UT" - 2009 ML1

K09M01L 2009 ML1 was discovered at 0907 UT on 23 June by the Mt. Lemmon Survey (MLS), which observed it at June 23.38-44p7 and 24.44p3. The discovery was confirmed by Astronomical Research Obs. (ARO) (June 24.34-37p3) and the Spacewatch 1.8m telescope (June 24.39p3).

<< DOU on 24 June '09 >> MPEC 2009-M31 - "06:06 UT" - Daily Orbit Update

Observations of risk-listed objects
K09M01G 2009 MG1 (small asteroid, arc=3 days, H=23.9 ~56m) from Spacewatch 1.8m (June 24.20p2)
K09M00U 2009 MU (small asteroid, arc=5 days, H=24.5 ~43m) from ARO (June 23.16-17p4), Doc Greiner Research Obs. (DGRO) (June 23.17-19p10), and Great Shefford Obs. (June 23.90-91p3 & 23.96-02p9)
K09M00S 2009 MS (i=53.7°, arc=5 days, H=16.0 ~2.14 km, q=0.863 AU) from ARO (June 23.24-26p3) and Great Shefford Obs. (June 24.03-04p2)
Observations of recently (no longer) risk-listed objects
K09L00X 2009 LX (Q=4.523 AU, arc=11 days, H=19.5 ~426m) from SSS (June 22.79p1)
K09L00S 2009 LS (i=45.0°, arc=11 days, H=18.0 ~851m) from ARO (June 23.20-21p4)
K09K05D 2009 KD5 (arc=29 days, H=18.2 ~776m) from Atlante Obs. (June 23.15-20p3) and La Sagra Obs. (June 24.13-14p3)
K09K04N 2009 KN4 (arc=30 days, H=18.2 ~776m) from SSS (June 22.79p1)
K09K02L 2009 KL2 (arc=34 days, H=18.1 ~812m) from Petit Jean Mtn. South Obs. (PJMSO) (June 23.27-28p6)
Observations of small asteroids (H>22.0)
K09L02V 2009 LV2 (arc=8 days, H=22.4 ~112m) from ARO (June 23.22-23p2)
Observations of other objects
K09M00W 2009 MW (arc=2 days, H=20.7 ~245m) from ARO (June 23.17-18p3)
K09M00A 2009 MA (arc=7 days, H=21.5 ~170m) from PJMSO (June 23.29-30p7)
K09J05R 2009 JR5 (arc=40 days, H=20.3 ~295m) from Spacewatch 1.8m (June 24.21p1)
K09E01D 2009 ED1 (arc=113 days, H=19.7 ~389m) from ARO (June 23.17-19p3 at V=22.1-2)
K09B02L 2009 BL2 (arc=156 days, H=19.4 ~446m) from ARO (June 23.18-19p4)
K02L38T 2002 LT38 (arc=2 opp, H=20.3 ~295m) from Thompsonville Obs. (June 24.13-16p5)
K02L00V 2002 LV (arc=3 opp, H=16.6 ~1.62 km) from PJMSO (June 23.28-29p5) and Atlante Obs. (June 23.97p3)
K01SS6E 2001 SE286 (arc=2 opp, H=17.8 ~933m) from ARO (June 23.26-29p3 at V=22.1-5)
K01H07Y 2001 HY7 (arc=5 opp, H=20.5 ~269m) from Jaen Obs. (June 23.95-96p2)
K01F90E 2001 FE90 (arc=2 opp, H=20.4 ~282m) from DGRO (June 23.14-15p15)
K01F01A 2001 FA1 (arc=5 opp, H=17.7 ~977m) from ARO (June 23.27-28p2)
K00K44N 2000 KN44 (Q=4.247 AU, arc=2 opp, H=18.5 ~676m) from the Spacewatch 0.9m telescope (June 23.17-20p3)
J99V22G 1999 VG22 (arc=6 opp, H=18.6 ~645m) from Spacewatch 0.9m (June 22.40-44p3)
J99T05C 1999 TC5 (arc=3 opp, H=18.5 ~676m) from ARO (June 23.21-24p3 at V=22.7-23.1)
L3869 213869 2003 SG170 from the Catalina Sky Survey (CSS) (June 23.28-32p4)
54401 54401 2000 LM from Jaen Obs. (June 24.03-05p2)
31345 31345 1998 PG from MLS (June 23.17-19p4)
25330 25330 1999 KV4 from SSS (June 23.65-68p3)
16960 16960 1998 QS52 from Spacewatch 0.9m (June 22.39p1)
16834 16834 1997 WU22 from LINEAR (June 23.39-42p5)
15745 15745 1991 PM5 from Zonalunar Obs. (June 22.94p1), Jaen Obs. (June 23.92-93p2), and El Guijo Obs. (June 23.97-99p3)
05626 5626 1991 FE from Spacewatch 0.9m (June 19.42-46p3)
05620 5620 Jasonwheeler (1990 OA) from Atlante Obs. (June 23.95p3)
03908 3908 Nyx (1980 PA) from MLS (June 23.20-23p4)

Observers on 24 June '09

Seventeen observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 11 in MPECs 2009-M31 & 2009-M32 -- 2009 MW, 2009 MU, 2009 MS, 2009 ML1, 2009 LV2, 2009 LS, 2009 ED1, 2009 BL2, 2001 SE286, 2001 FA1, 1999 TC5
`J51`	Atlante Obs. in the Canary Islands, 3 in MPEC 2009-M31 -- 2009 KD5, 2002 LV, 5620
`703`	Catalina Sky Survey in Arizona, 1 in MPEC 2009-M31 -- 213869
`H26`	Doc Greiner Research Obs. (DGRO) in Wisconsin, 2 in MPEC 2009-M31 -- 2009 MU, 2001 FE90
`J27`	El Guijo Obs. in Spain, 1 in MPEC 2009-M31 -- 15745
`J95`	Great Shefford Obs. in England, 2 in MPEC 2009-M31 -- 2009 MU, 2009 MS
`J28`	Jaen Obs. in Spain, 3 in MPEC 2009-M31 -- 2001 HY7, 54401, 15745
`704`	LINEAR in New Mexico, 1 in MPEC 2009-M31 -- 16834
`J75`	La Sagra Obs. in Spain, 1 in MPEC 2009-M31 -- 2009 KD5
`568`	Mauna Kea in Hawaii, 1 in MPEC 2009-M34 -- 2005 UN524
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2009-M31 & 2009-M32 -- 2009 ML1, 31345, 3908
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2009-M31 -- 2009 MA, 2009 KL2, 2002 LV
`E12`	Siding Spring Survey (SSS) in New South Wales, 4 in MPECs 2009-M31 & 2009-M33 -- 2009 MM1, 2009 LX, 2009 KN4, 25330
`691`	Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2009-M31 -- 2000 KN44, 1999 VG22, 16960, 5626
`291`	Spacewatch 1.8m telescope in Arizona, 3 in MPECs 2009-M31 & 2009-M32 -- 2009 ML1, 2009 MG1, 2009 JR5
`H53`	Thompsonville Obs. in Illinois, 1 in MPEC 2009-M31 -- 2002 LT38
`J08`	Zonalunar Obs. in Spain, 1 in MPEC 2009-M31 -- 15745

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 24 June '09

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2358 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.
0000NNN000 Object	Risk Monitor	When Noted UTC	0000T0000 Year Range	VI #	000NN00 Prob Cum	T0000 PS Cum	T0000 PS Max	T S	Notes for Today's Latest Risk Assessments

2009 MG1	JPL Sentry	1330	2079-2083	3	2.6e-07	-6.06	-6.34	0	JPL: "Analysis based on 15 observations spanning 2.9300 days (2009-Jun-21.27223 to 2009-Jun-24.20218)." Diameter approximately 0.056 km. from mean, weighted H=23.9.
2009 MG1	NEODyS	1330	2079-2083	4	2.56e-07	-6.07	-6.33	0	NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2009/06/21.273 to 2009/06/24.203."

2009 MU	JPL Sentry	1330	2096-2099	2	1.8e-07	-6.72	-6.78	0	JPL: "Analysis based on 87 observations spanning 4.7182 days (2009-Jun-19.30659 to 2009-Jun-24.024819)." Diameter approximately 0.042 km. from mean, weighted H=24.5.

2009 MS	JPL Sentry	1330	2034	1	1.4e-10	-4.55	-4.55	0	JPL: "Analysis based on 22 observations spanning 4.8134 days (2009-Jun-19.22249 to 2009-Jun-24.03593)." Diameter approximately 2.400 km. from mean, weighted H=15.8.
2009 MS	NEODyS	1330	R E M O V E D						-

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.

Chronology on 24 June '09

Times are UTC for when items were noted or added by The Tracking News.

2309	Grabbed MPEC 2009-M34 - 2005 UN524 = 2003 YW292 - see above
2001	Grabbed MPEC 2009-M33 - 2009 MM1 - see above
1530	Grabbed MPEC 2009-M32 - 2009 ML1 - see above
1330	Noted that JPL Sentry has updated its 2009 MG1 risk assessment - see above Noted that NEODyS has posted 2009 MG1 as an impact risk - see above Noted that JPL Sentry has updated its 2009 MS risk assessment - see above Noted that NEODyS has removed 2009 MS as an impact risk - see above Noted that JPL Sentry has updated its 2009 MU risk assessment - see above Grabbed MPEC 2009-M31 - Daily Orbit Update - see above

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